Cite This Item
MLA
Allegheny Observatory, Riverview Park, N.S. Pittsburgh, Pa.. Pittsburg, PA: I. Robbins & Son, [ca. 1930–1950]. Web. 27 Apr 2024. <https://ark.digitalcommonwealth.org/ark:/50959/dz011072w>.
APA
Allegheny Observatory, Riverview Park, N.S. Pittsburgh, Pa. [Card]. ([ca. 1930–1950]). Retrieved from https://ark.digitalcommonwealth.org/ark:/50959/dz011072w
Chicago
"Allegheny Observatory, Riverview Park, N.S. Pittsburgh, Pa." Card. Pittsburg, PA: I. Robbins & Son, [ca. 1930–1950]. Digital Commonwealth, https://ark.digitalcommonwealth.org/ark:/50959/dz011072w (accessed April 27, 2024).